EP3967176B1 - Chaîne de fermeture, et fermeture à glissière - Google Patents

Chaîne de fermeture, et fermeture à glissière Download PDF

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Publication number
EP3967176B1
EP3967176B1 EP19927829.2A EP19927829A EP3967176B1 EP 3967176 B1 EP3967176 B1 EP 3967176B1 EP 19927829 A EP19927829 A EP 19927829A EP 3967176 B1 EP3967176 B1 EP 3967176B1
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EP
European Patent Office
Prior art keywords
fastener
leg portion
tape
upper leg
fastener element
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EP19927829.2A
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German (de)
English (en)
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EP3967176A1 (fr
EP3967176A4 (fr
Inventor
Takumi Arai
Kenichi Yamada
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YKK Corp
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YKK Corp
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Publication of EP3967176A4 publication Critical patent/EP3967176A4/fr
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    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
    • A44B19/00—Slide fasteners
    • A44B19/10—Slide fasteners with a one-piece interlocking member on each stringer tape
    • A44B19/12—Interlocking member in the shape of a continuous helix
    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
    • A44B19/00—Slide fasteners
    • A44B19/24—Details
    • A44B19/34—Stringer tapes; Flaps secured to stringers for covering the interlocking members

Definitions

  • the present invention relates to a fastener chain having a right and left pair of fastener stringers in which a plurality of fastener elements continuing in a coil shape are sewn to a fastener tape, and a slide fastener formed using the fastener chain.
  • a slide fastener in which a plurality of fastener elements obtained by molding a synthetic resin monofilament in a coil shape are attached to a fastener tape is known.
  • the plurality of fastener elements continuing in a coil shape are fixed to the fastener tape with a sewing thread along with a core string in a state that the core string passes through between an upper leg portion and a lower leg portion of each fastener element, thereby an element row is formed along a tape length direction of the fastener tape.
  • Patent Document 1 An example of the slide fastener in which a plurality of coiled fastener elements are sewn to the fastener tape is described in JP2001-37507A (Patent Document 1).
  • a plurality of the coiled fastener elements 71 are sewn to the fastener tape 74 together with the core string 72 by multi-thread chain stitching of the sewing thread 73 to form the fastener stringer 70.
  • the fastener element 71 has a coupling head portion 71a, an upper leg portion 71b and a lower leg portion 71c extending from the coupling head portion 71a in a tape width direction and a connecting portion 71d connecting the upper leg portion 71b (or the lower leg portion 71c) to a lower leg portion 71c (or an upper leg portion 71b) of another fastener element 71 adjacent in a tape length direction.
  • the upper leg portion 71b and the lower leg portion 71c are disposed to be apart from each other in a tape top and back direction.
  • the core string 72 passes between the upper leg portion 71b and the lower leg portion 71c of the fastener element 71 throughout the element row.
  • the sewing thread 73 used for fixing the fastener element 71 has a needle thread and a looper thread which form a sewn portion by interlooping.
  • the needle thread of the sewing thread 73 pierces the fastener tape 74 and the core string 72, and the looper thread presses an upper surface of the upper leg portion 71b, thereby each fastener element 71 is fixed to the fastener tape 74 with the sewn portion together with the core string 72.
  • each fastener element 71 is sewn together with the core string 72, the fastener element 71 is firmly fixed to a predetermined position of the fastener tape 74. Further, since the fixing state of the fastener element 71 is stabilized, the fastener element 71 can be prevented from, for example, dropping from between the needle thread and the looper thread of the sewing thread 73.
  • a step portion 75 is provided, and due to the step portion 75, the upper surface of the upper leg portion 71b disposed on the connecting portion 71d side of the step portion 75 is disposed at a lower position regarding the height direction than the upper surface of the upper leg portion 71b disposed on the coupling head portion 71a side of the step portion 75. Since the sewing thread 73 (looper thread) is arranged at the low upper surface of the upper leg portion 71b on the connecting portion 71d side, the sewing thread 73 can be less likely to be contacted with the slider when the slider is slid along the element row, and as a result, the abrasion of the sewing thread 73 is suppressed.
  • the core string 72 is interposed by the upper leg portion 71b and the lower leg portion 71c, as shown in Fig. 7 . Therefore, regarding the tape top and back direction, a range that the upper surface of the upper leg portion 71b on the connecting portion 71d side can be lowered with respect to the upper surface on the coupling head portion 71a side is restricted due to the presence of the core string 72.
  • a dimension in the height direction from the upper surface position on the coupling head portion 71a side to the upper surface position on the connecting portion 71d side in the upper leg portion 71b (a difference in the height direction between the two upper surface positions) has been conventionally about 10% or so of the height dimension of the whole fastener element 71, at the largest. Therefore, because when the step portion 75 is provided, it is sufficient that the sewing thread 73 is arranged lower than the upper surface position of the upper leg portion 71b on the coupling head portion 71a side, it has not been needed to secure a so large difference between the two upper surface positions in the height direction as above.
  • the sewing thread 73 for fixing the fastener element 71 pierces the core string 72 and pushes the upper surface of the upper leg portion 71b toward the fastener tape 74.
  • the sewing thread 73 for piercing the core string 72 on the upper surface on the connecting portion 71d side of the upper leg portion 71b which has a low height position, it has been needed to secure the upper surface on the connecting portion 71b side to be large in some extent in the tape width direction so as to correspond to a width dimension of the core string 72.
  • the step portion 75 of the upper leg portion 71b was provided so that a width dimension (dimension in the tape width direction) from a position of an element end edge of the fastener element 71 on the connecting portion 71d side to a boundary position between the upper surface of the upper leg portion 71b on the connecting portion 71d side and a sloped surface of the step portion 75 can secure a size at least 50% with respect to the width dimension of the entire fastener element 71.
  • Patent Document 1 2001-37507 A
  • EP1112700A2 discloses a slide fastener comprising a fastener element in which a metallic coating layer is formed, the metallic coating layer being never scraped by a sliding of a slider.
  • a metallic coating layer is formed on the surface of a leg portion except an inverted portion and a coupling head with which a guide flange and a guide post of a slider come into contact.
  • DE112012005338B4 discloses a fastener stringer which is configured so that fastener elements are prevented from being damaged by a pointed metal object, a thread for sewing the fastener elements to a fastener tape is prevented from wearing away, and the fastener stringer allows a slide fastener to be easily attached to an object to which the slide fastener is to be attached; a slide fastener for a luggage case; and a luggage case.
  • EP1072209A2 discloses a coil-shaped fastener element comprising of a coupling head bulging to both sides, upper/lower leg portions adjacent the coupling head and a connecting portion for connecting the upper and lower leg portions. With providing a stepped portion in a center of the upper leg portion, a portion of the fastener element on a side of the coupling head is formed thick while a portion thereof on a side of the connecting portion is formed thin. A coupling space is provided between the upper and lower leg portions.
  • WO2016016952A1 discloses a tapeless stringer comprising a bottom leg portion of a fastener element having a first extended portion extending from a meshing head portion, a step portion bending from the first extended portion, and a second extended portion extending from the step portion, and an accommodating space portion that can accommodate the material on which the fastener is to be attached is formed under the second extended portion by way of the step portion.
  • the slide fastener is formed such that the core string continuously passes through the coil-shaped fastener element along an element row, when right and left element rows are coupled, right and left core strings can be contacted by each coupling head portion of the fastener element of the coupling counterpart.
  • a dimension in the tape width direction that the coupled right and left fastener elements are coupled to overlap can be regulated by the right and left core strings.
  • the present invention is made in view of the above conventional problems, and its objective is to provide a fastener chain in which a coil-shaped fastener element is sewn to a fastener tape without using a core string, which can prevent the fastener element from exiting from between the sewing thread, and which can stably secure a space for inserting a sewing needle between the fastener elements adjacent in the length direction at the time of sewing processing with a sewing machine, and to provide a slide fastener formed using the fastener chain.
  • a fastener chain provided by the present invention is, as the main feature, the fastener chain having a pair of fastener stringers in which a plurality of fastener elements continuing in a coil shape are respectively sewn with a sewing thread to right and left fastener tapes, in which the fastener element has a coupling head portion, a lower leg portion extending from one end part of the coupling head portion and contacted with the fastener tape, an upper leg portion extending in a tape width direction from the other end part of the coupling head portion to be apart from the lower leg portion, and a connecting portion connecting the upper leg portion and a lower leg portion of another fastener element adjacent in a length direction; in which the fastener element is sewn to the fastener tape such that the upper leg portion and the lower leg portion face to each other via a space portion, the upper leg portion has a first upper surface continuing from the connecting portion and a second upper surface extending and sloping upward from the first upper surface via
  • the space portion has, regarding the tape width direction, a first space portion disposed on the coupling head portion side of the bent portion and a second space portion disposed on the coupling head portion side of the bent portion and provided with a larger height dimension than the first space portion, and the element contacting portion is disposed to bulge in a convex surface shape toward the second space portion in a front view of the fastener element.
  • a height dimension between a position of the top end surface and a position of the bent portion in the upper leg portion is 25% or smaller of the height dimension of the whole fastener element.
  • a monofilament forming a plurality of the fastener elements has a cross-sectional shape at the upper leg portion and the lower leg portion showing a flattened substantially oval shape that a larger width dimension of the monofilament than the height dimension of the monofilament.
  • a maximum value of the height dimension of the second space portion is 50% or larger and 100% or smaller of the height dimension of the lower leg portion.
  • a slide fastener provided by the present invention is, as the main feature, formed by attaching a slider to right and left element rows of the fastener chain having the above-mentioned structure.
  • a plurality of fastener elements continuing in a coil shape are sewn to a fastener tape with a sewing thread.
  • the fastener element is sewn to the fastener tape in a state that the upper leg portion and the lower leg portion of the fastener element directly face to each other via the space portion without a conventional core string being interposed.
  • the upper leg portion of the fastener element has a first upper surface continuing from the connecting portion, and a second upper surface extending from the first upper surface via a bent portion toward the coupling head portion and sloped upward to be apart from the fastener tape.
  • slope angles of the first upper surface and the second upper surface with respect to the tape upper surface of the fastener tape are changed at the bent portion.
  • the sewing thread pierces the fastener tape only, and arranged to contact the first upper surface of the upper leg portion, thereby, fixes the fastener element to the fastener tape.
  • the height dimension (dimension in the height direction) between the position of the top end surface and the position of the bent portion disposed on the upper leg portion is 20% or larger of the height dimension of the whole fastener element.
  • the top end surface of the upper leg portion here is an upper surface of the upper leg portion disposed to be farthest in a tape top and back direction (height direction) from the tape upper surface of the fastener tape in a front view (or a back view) when the fastener element is viewed from the tape length direction, and may be formed in a flat plate shape or a curved surface shape.
  • the height dimension between the top end surface and the bent portion of the upper leg portion is a size of 20% or larger of the height dimension of the whole fastener element
  • a difference (step) between the height position of the first upper surface of the upper leg portion and the height position of the top end surface of the upper leg portion can be large. Therefore, even when the fastener chain or the fastener stringer is twisted, and the fastener element receives a pressing force to be pressed toward a tape inside of the fastener tape, the sewing thread cannot easily climb over the top end surface of the upper leg portion (in other words, the top end surface of the upper leg portion cannot easily pass through the sewing thread). As a result, troubles such that the fastener element exits from the sewing thread and came off to a tape inside can less occur.
  • the upper leg portion has a first lower surface which is sloped toward the coupling head portion to be away from the fastener tape in a plan view of the fastener element, and a second lower surface which is sloped toward the coupling head portion to approach the fastener tape or to be parallel to the fastener tape.
  • the upper leg portion of the fastener element has the element contacting portion which is formed to be able to contact with the fastener element of the coupling counterpart, and the element contacting portion is disposed in an area on which the first lower surface is disposed in the tape width direction.
  • the element contacting portion as mentioned above is provided on a part which the first lower surface of the upper leg portion is disposed of each fastener element, when the right and left fastener elements are coupled, a coupled amount of the coupled right and left fastener elements can be regulated in a predetermined degree.
  • a gap in which a sewing needle can be inserted can be stably secured between the fastener elements adjacent in the length direction so that the sewing needle does not interfere the fastener elements.
  • sewing processing to sew the fastener elements to the fastener tape can be smoothly and stably performed so that the vertical move of the sewing needle is not interfered by the fastener element on the coupling counterpart.
  • the space portion formed between the upper leg portion and the lower leg portion of the fastener element has, in the tape width direction, a first space portion disposed on the connecting portion side of the bent portion, and a second space portion disposed on the coupling head portion side of the bent portion.
  • the second space portion is provided with a larger height dimension than the first space portion.
  • the element contacting portion of the upper leg portion is provided such that the lower surface of the element contacting portion is bulged gently in a convex surface shape toward the second space portion in the front view (back surface view) of the fastener element viewing the fastener element from the tape length direction.
  • the element contacting portion is provided to bulge in a convex shape in an area of the second space portion in each fastener element, when the right and left fastener elements are coupled, the coupled amount of the fastener elements can be stably regulated in a predetermined degree.
  • a height dimension between a position of the top und surface and a position of the bent portion in the upper leg portion is 25% or smaller of the height dimension of the whole fastener element. Therefore, the step in the height direction between the first upper surface and the top end surface of the upper leg portion can be provided appropriately not to be too large, and the slide fastener can be finished such that the element rows have good outer appearance quality and good touch feeling.
  • the monofilament to form a plurality of fastener elements has a cross-sectional shape at the upper leg portion and the lower leg portion showing a flattened and substantially oval shape in which the width dimension of the monofilament is larger than the height dimension of the monofilament.
  • the fastener element can be easily formed so that the height dimension between the top end surface and the bent portion of the upper leg portion is 20% or larger of the height dimension of the whole fastener element.
  • Such a fastener element can have increased coupling strength compared with a case that the cross-section of the upper leg portion and the lower leg portion is a circular shape, for example.
  • the maximum value of the height dimension of the second space portion is 50% or larger and 100% or smaller of the height dimension of the lower leg portion (in other words, the height dimension of the monofilament to form the fastener element).
  • the slide fastener provided by the present invention is formed by attaching a slider to the right and left element rows formed on the fastener chain having the above-mentioned configuration.
  • a slide fastener of the present invention a plurality of the fastener elements are attached to the fastener tape without using the core string, thereby manufacturing cost can be reduced. Even when the fastener element receives a pressing force to be pushed toward a tape inside of the fastener tape, the fastener element can be prevented from exiting to the tape inside, and the function of the slide fastener can be stably maintained.
  • Fig. 1 is a plan view illustrating a slide fastener according to Embodiment
  • Fig. 2 is a plan view illustrating a main part of a fastener stringer on the right side.
  • Fig. 3 is a cross-sectional view along the line III - III shown in Fig. 1
  • Fig. 4 is a cross-sectional view of the fastener element only.
  • a front and rear direction means a tape length direction of the fastener tape which is parallel to the sliding direction of the slider, and the direction that the slider slides to couple right and left element rows (closing direction) is defined as the front, and the direction to separate right and left element rows (separating direction) is the rear.
  • a right and left direction means a tape width direction of the fastener tape, and is a direction perpendicular to the sliding direction of the slider as well as parallel to a top surface (upper surface) and a back surface (lower surface) of the fastener tape, for example.
  • An upper and lower direction means a direction perpendicular to the front and rear direction and to the right and left direction, and for example, it means a height direction of a fastener element perpendicular to the top surface (tape upper surface) and the back surface (tape lower surface) of the fastener tape.
  • a direction on a side the fastener element is attached with respect to the fastener tape is an upper side, and a direction on the opposite side is a lower side.
  • a slide fastener 1 according to Embodiment is formed by attaching a slider 40 to element rows 12 of a fastener chain 10 having a right and left pair of fastener stringers 11 to be able to slide.
  • the slider 40 has the substantially same configuration as a general slider used for a slide fastener having conventional coil-shaped fastener elements.
  • the slider 40 of Embodiment is briefly explained.
  • the slider 40 has a slider body 41 and a tab 42 to be attached to the slider body 41.
  • the slider body 41 has an upper blade 41a, a lower blade disposed to be apart from the upper blade 41a, a connecting column connecting a front end part of the upper blade 41a and a front end part of the lower blade, right and left upper flange portions extending from right and left side edge parts of the upper blade 41a toward the lower blade, and a tab attaching portion 41b provided on the upper blade 41a.
  • right and left shoulder mouths are provided to interpose the connecting column therebetween, and a rear mouth is provided on a rear end part of the slider body 41.
  • an element guide pass in a substantially Y-shape and communicating the right and left shoulder mouths and the rear mouth is formed.
  • Each of right and left fastener stringers 11 of Embodiment has a fastener tape 13 and a plurality of fastener elements 20 in a continuous manner and sewn to a tape side edge part near the coupling counterpart side of the fastener tape 13 with a sewing thread 14, and is formed without using a core string which is set on a conventional general coil-shaped fastener element row.
  • a plurality of fastener elements 20 disposed on the fastener stringer 11 are formed by rolling a monofilament made of thermoplastic resin such as polyamide or polyester so that a cross-section (lateral cross-section) perpendicular to the length direction has a flattened and substantially oval shape, and thereafter, while molding the rolled monofilament in a coil shape, serially performing a predetermined press processing to form a coupling head portion 21 and a bent portion 28, as described later.
  • a lateral cross-sectional shape of the monofilament at the upper leg portion 23 and the lower leg portion 22, as described later, of the fastener element 20 is a substantially oval shape near a rounded rectangle in which the upper surface and the lower surface are formed in a substantially flat shape and a dimension in the height direction of the monofilament is shorter than the dimension in the width direction by the above-mentioned rolling processing.
  • the coupling head portion 21 on the coupling counterpart can be engaged firmly between the fastener elements 20 adjacent in the length direction.
  • the coupling strength of the right and left element rows can be increased.
  • chain breaking such as discoupling of the fastener elements 20 can be reduced.
  • Each fastener element 20 of Embodiment has a coupling head portion 21 disposed outside a tape side edge of the fastener tape 13, a lower leg portion 22 extending from a lower end part of the coupling head portion 21 in the tape width direction, an upper leg portion 23 extending in the tape width direction from an upper end part of the coupling head portion 21 to be apart from the lower leg portion 22, and a connecting portion 24 connecting the upper leg portion 23 and a lower leg portion 22 of another fastener element 20 (fastener element adjacent in front in the case of Embodiment) adjacent in one of the length direction.
  • Each fastener element 20 is, in a plan view of the fastener element 20 viewing from the tape length direction, or a cross-sectional view (see Fig. 4 ) of the fastener element 20 in a direction perpendicular to the tape length direction, fixed with a sewn portion (stitches) 15 of a sewing thread 14 in a state that the upper leg portion 23 and the lower leg portion 22 directly face to each other via the space portion 25 formed to be thin and long in the width direction, and no inclusion such as a core string is disposed between the upper leg portion 23 and the lower leg portion 22.
  • the upper leg portion 23 and the lower leg portion 22 directly face to each other not only in a partial region in the tape width direction, but also in a whole region of the tape width direction, via the space portion 25 without inclusion or in a contacted state.
  • the sewn portion 15 for fixing the fastener element 20 is formed with a multi-thread chain stitching using two sewing needles, and the sewing thread 14 for forming the sewn portion 15 has two needle threads 14a to pierce the fastener tape 13 and a looper thread 14b to contact the upper surface of the upper leg portion 23 (particularly a first upper surface 27a, described later, of the upper leg portion 23), to press the upper leg portion 23 toward the fastener tape 13 and to perform looping with the needle thread 14a.
  • the fastener element 20 can be firmly fixed to the fastener tape 13 without a core string by sewing the fastener element 20 with the sewn portion 15 including the two needle threads 14a.
  • the coupling head portion 21 of the fastener element 20 is formed to extend in the upper and lower direction. In the middle part in the height direction of the coupling head portion 21, front and rear bulged portions bulged in the front and rear direction are provided.
  • the bulged portion of the coupling head portion 21 is formed to be able to be inserted into a second space portion 25b, described later, of the fastener element 20 of the coupling counterpart, and to be able to contact with an element contacting portion 23a, described later, of the coupling counterpart fastener element 20.
  • the lower leg portion 22 is extended from a lower end part of the coupling head portion 21 along a right and left direction and is disposed to contact with the fastener tape 13.
  • An end part of the lower leg portion 22 on a side close to the coupling counterpart is connected to the lower end part of the coupling head portion 21, and the other end part of the lower leg portion 22 on a side apart from the coupling counterpart is connected to the connecting portion 24 which is jointed with the upper leg portion 23 of a fastener element 22 adjacent in the rear direction.
  • the lower leg portion 22 is formed in a linear form along the tape width direction or a substantially linear form to curve so that the middle part in the tape width direction is slightly declined.
  • the upper leg portion 23 has, in a front view or a cross-sectional view of the fastener element (see Fig. 4 ), a lower surface 26 facing to the lower leg portion 22, and an upper surface 27 disposed on an opposite side of the lower surface 26 and a side to be exposed outside.
  • the lower surface 26 of the upper leg portion 23 has a first lower surface 26a which is sloped to be apart from the tape upper surface of the fastener tape 13 toward the coupling head portion 21, and a second lower surface 26b which is sloped to approach the tape upper surface of the fastener tape 13 toward the coupling head portion 21.
  • a boundary portion 29 in a bent shape at which a slope angle is changed by 5° or larger (preferably 10° or larger) is disposed.
  • the second lower surface 26b of the upper leg portion 23 may be disposed parallel to the tape upper surface of the fastener tape 13 partially.
  • the upper surface 27 of the upper leg portion 23 has a first upper surface (connecting-side upper surface) 27a continuously disposed from the connecting portion 24, a second upper surface (intermediate slope upper surface) 27b which is extended and sloped upward from the first upper surface 27a via the bent portion 28 toward the coupling head portion 21, a third upper surface (top end surface) 27c disposed farthest away from the fastener tape 13, and a fourth upper surface (head portion-side upper surface) 27d which is sloped downward from the third upper surface 27c toward the coupling head portion 21.
  • At least the second upper surface 27b, the third upper surface 27c and the fourth upper surface 27d of the upper leg portion 23, and a part of the lower surface 26 corresponding to the second upper surface 27b through the fourth upper surface 27d of the upper leg portion 23 are disposed in a non-parallel relation which are not parallel to each other at each corresponding part.
  • the non-parallel relation here means a relation except that, when the upper surface and the lower surface of the upper leg portion 23 are in a curved surface shape, directions of the curved surfaces (convex-shaped direction or concave-shaped direction toward the above, for example) are the same and at the same time, directions of the tangent line are the same.
  • the bent portion 28 as a boundary between the first upper surface 27a and the second upper surface 27b of the upper leg portion 23, and the boundary portion 29 between the first lower surface 26a and the second lower surface 26b of the upper leg portion 23 are provided at different positions in the tape width direction from each other, and the boundary portion 29 of the lower surface 26 is disposed at a position closer to the coupling head portion 21 in the tape width direction (position shifted on the coupling head portion 21 side), with respect to the bent portion 28 of the upper surface 27.
  • the first upper surface 27a of the upper leg portion 23 is disposed smoothly and continuously without forming a step with respect to the upper surface of the connecting portion 24, and in the plan view or the cross-sectional view of the fastener element, it is moderately sloped upward toward the coupling head portion 21 so as to be gradually separated from the fastener tape 13 to the bent portion 28.
  • the first upper surface 27a of the upper leg portion 23 is sloped at a substantially constant angle.
  • a slope angle ⁇ 1 of the first upper surface 27a to the tape upper surface of the fastener tape 13 is larger than 0° and 30° or smaller, and preferably 5° or larger and 20° or smaller.
  • the slope angle ⁇ 1 here means an angle between an imaginary flat surface formed to be extended from the bent portion 28 toward the connecting portion 24 side in a direction parallel to the tape upper surface of the fastener tape 13, and the first upper surface 27a.
  • the space portion 25 (particularly, a second space portion 25b, described later) can be secured in an appropriate size between the upper leg portion 23 and the lower leg portion 22, and a part of a coupling head portion 21 on the coupling counterpart can be smoothly inserted in the space portion 25.
  • the sewing thread 14 (looper thread 14b) of the sewn portion 15 can be contacted and stably placed on the first upper surface 27a. Further, a height dimension H1 of a clearance 30 provided between a position of the third upper surface (top end surface) 27c and a position of the bent portion 28 can be easily secured in a large degree, as described later.
  • the second upper surface 27b of the upper leg portion 23 is, in the plan view or the cross-sectional view of the fastener element, formed to have a larger slope angle than the first upper surface 27a of the upper leg portion 23 via the bent portion 28, and is formed to be slightly curved upward in a convex shape while the slope angle is decreased toward the coupling head portion 21.
  • the bent portion 28 of the upper leg portion 23 is a part that the slope angle of the upper surface of the upper leg portion 23 is locally changed.
  • it in the plan view of the fastener element 20 from the above, it is formed as a short linear mark or the like which is slightly oblique to the tape length direction, for example.
  • Such a bent portion 28 is formed due to the press processing for providing a step in the height direction between the first upper surface 27a and the top end surface 27c of the upper leg portion 23 in the molding process of molding a linear-shaped monofilament to the coil-shaped fastener element 20, and in some cases, it can be seen as a processing trace (molding trace) when the fastener element 20 is viewed to be enlarged.
  • the bent portion 28 of Embodiment is formed such that a slope angle ⁇ 2 at a part close to the bent portion 28 on the second upper surface 27b is larger than the above-mentioned slope angle ⁇ 1 of the first upper surface 27a (particularly, the slope angle at a part close to the bent portion 28 on the first upper surface 27a).
  • the slope angle ⁇ 2 here means an angle between an imaginary flat surface formed to be extended in a direction parallel to the tape upper surface of the fastener tape 13 from the bent portion 28 toward the coupling head portion 21 side and a part close to the bent portion 28 in the second upper surface 27b.
  • the part close to the bent portion 28 in the second upper surface 27b means a surface of a part to be directly extended from the bent portion 28 of the second upper surface 27b.
  • the slope angle ⁇ 2 in a case that the close part is formed to be a curved surface is an angle that the tangent line of the curved surface is sloped with respect to the tape upper surface of the fastener tape 13.
  • the slope angle of the above-mentioned part of the second upper surface 27b to the tape upper surface of the fastener tape 13 is 5° or larger and 80° or smaller, and preferably 15° or larger and 60° or smaller. Further, a difference of the slope angles in the first upper surface 27a and in the second upper surface 27b disposed on the right and left of the bent portion 28 is 5° or larger and 70° or smaller, and preferably 10° or larger and 60° or smaller.
  • the slope angle ⁇ 2 of the second upper surface 27b is set as above with respect to the tape upper surface of the fastener tape 13 and the first upper surface 27a of the upper leg portion 23, and when the slide fastener 1 is twisted and the fastener elements 20 receive a pressing force to be pushed toward the tape inside of the fastener tape 13, for example, it can be less occurred that the sewing thread 14 slips on the second upper surface 27b of the upper leg portion 23 and climbs over the third upper surface (top end surface) 27c. Further, the height dimension He of the entire fastener element 20 can be controlled in an appropriate size, thereby outer appearance quality and touch feeling of the slide fastener 1 can be improved.
  • the third upper surface (top end surface) 27c of the upper leg portion 23 is disposed between the second upper surface 27b which is sloped upward to the coupling head portion 21 and the fourth upper surface 27d which is sloped downward to the coupling head portion 21, and is formed to be a flat surface parallel to the tape upper surface of the fastener tape 13 or a continuous curved surface in which the tangent line is parallel to the tape upper surface of the fastener tape 13 in the plan view or the cross-sectional view of the fastener element.
  • a first width dimension W1 which is a dimension in the tape width direction from the bent portion 28 to an element end edge on the tape inside of the fastener tape 13 is 20% or larger and 50% or smaller, and preferably 25% or larger and 40% or smaller of a width dimension We of the entire fastener element 20, as shown in Fig. 4 .
  • the width dimension We of the entire fastener element 20 means a dimension in the tape width direction from the element end edge disposed on the tape-innermost in the connecting portion 24 of the fastener element 20 to the element end edge disposed on the tape-outermost in the coupling head portion 21.
  • the width dimension W1 is 20% or larger of the width dimension We of the entire fastener element 20
  • the width dimension of the first upper surface 27a can be appropriately secured, and the sewing thread 14 can be stably contacted with the first upper surface 27a, thereby the fastener element 20 can be fixed with the sewing thread 14 firmly.
  • the first width dimension W1 is 50% or smaller of the width dimension We of the entire fastener element 20, an element contacting portion 23a, described later, can be formed stably on the upper leg portion 23.
  • the sewing thread 14 can be arranged in an area on the connecting portion 24 side of the center position in the tape width direction of the fastener element 20, and preferably arranged in an area that the width dimension of the fastener element 20 from the element end edge position on the tape inside is 40% or smaller of the entire width dimension We of the fastener element 20, thereby the fastener element 20 can be fixed.
  • the height dimension H1 of the clearance 30 provided from the height position (position in the height direction) of the top end surface 27c of the fastener element 20 to the height position of the bent portion 28 is 20% or larger and 25% or smaller of the height dimension of the entire fastener element 20, as shown in Fig. 4 .
  • the height dimension He of the entire fastener element 20 here means a dimension in the tape top and back direction from a height position of the lower surface of the lower leg portion 22 of the fastener element 20 (or a height dimension of the tape upper surface of the fastener tape 13) to the third upper surface (top end surface) 27c of the upper leg portion 23.
  • the sewing thread 14 can keep holding the upper leg portion 23 firmly and stably. Thereby, move of the fastener element 20 in the tape width direction is restricted, and it can be less likely to occur that the sewing thread 14 relatively climbs over the top end surface 27c of the upper leg portion 23 (the top end surface 27c of the upper leg portion 23 passes under an inside the sewing thread 14).
  • the height dimension H1 of the clearance 30 is 25% or smaller of the height dimension He of the entire fastener element 20, thereby a difference between the height position of the first upper surface 27a of the upper leg portion 23 and the height position of the third upper surface 27c is prevented from being too large, and the element row 12 of the slide fastener 1 can be formed to have good outer appearance quality and good touch feeling.
  • the space portion 25 formed between the upper leg portion 23 and the lower leg portion 22 in the plan view or the cross-sectional view of the fastener element ( Fig. 4 ) 20 has, in the tape width direction, a first space portion 25a disposed on the connecting portion 24 side of the position of the bent portion 28 in the upper leg portion 23, and a second space portion 25b disposed on the coupling head portion 21 side of the position of the bent portion 28.
  • the second space portion 25b is formed to have a larger height dimension than the maximum value of the height dimension of the first space portion 25a. That is, the second space portion 25b of the fastener element 20 is formed so that the minimum value of the height dimension is larger than the maximum value of the height dimension of the first space portion 25a.
  • the height dimension of the first space portion 25a and the height dimension of the second space portion 25b here mean dimensions from the upper surface of the lower leg portion 22 to the lower surface 26 of the upper leg portion 23.
  • the maximum value of the height dimension of the second space portion 25b is 50% or larger and 100% or smaller, and preferably 60% or larger and 95% or smaller of the height dimension from the lower surface to the upper surface of the lower leg portion 22 (in other words, the height dimension of the monofilament to form the fastener element 20).
  • the height dimension of the second space portion 25b is the largest at the position of the boundary portion 29 disposed between the first lower surface 26a and the second lower surface 26b of the upper leg portion 23.
  • the maximum value of the height dimension of the second space portion 25b is 50% or larger of the height dimension of the lower leg portion 22, a part of the coupling head portion 21 of the coupling counterpart can be smoothly inserted into the second space portion 25b, and the right and left fastener elements 20 can be stably coupled. Further, since the maximum value of the height dimension of the second space portion 25b is 100% or smaller of the height dimension of the lower leg portion 22, the bulged portion disposed on the coupling head portion 21 of the coupling counterpart can be stably contacted with an element contacting portion 23a, described later, of the upper leg portion 23. In addition, the height dimension He of the entire fastener element 20 can be smaller than that of the conventional coil-shaped fastener element having the core string, for example, improvement in outer appearance quality and touch feeling of the slide fastener 1 can be attempted.
  • the upper leg portion 23 of Embodiment has an element contacting portion 23a formed to moderately bulge in a convex surface shape toward the second space portion 25b in the plan view of the fastener element 20.
  • the element contacting portion 23a is, regarding the tape width direction, provided on the second space portion 25b-side in an area in which the above-mentioned first lower surface 26a of the upper leg portion 23 is disposed in the plan view of the fastener element 20. That is, the element contacting portion 23a is, regarding the tape width direction, provided between the bent portion 28 provided on the upper surface of the upper leg portion 23 and the boundary portion 29 provided on the lower surface of the upper leg portion 23.
  • the element contacting portion 23a can contact the coupling head portion 21 (particularly, the bulged portion of the coupling head portion 21) of the coupling counterpart when the right and left fastener elements 20 are coupled.
  • the element contacting portion 23a can contact with the coupling head portion 21 of the coupling counterpart, it may also be formed such that the lower surface of the element contacting portion 23a is not a curved surface slightly curved in a convex shape as in Embodiment, but a flat surface sloped at a constant angle in the plan view of the fastener element 20.
  • each fastener element 20 has such an element contacting portion 23a, when the right and left fastener elements 20 before sewn to the fastener tape 13 are coupled, for example, the coupled amount (depth of coupling) in the width direction of the coupled right and left fastener elements 20 can be controlled by the contact of the element contacting portion 23a of each fastener element 20 with the coupling head portion 21 of the coupling counterpart.
  • a gap 31 penetrating in the height direction can be provided between the connecting portion 24 of the fastener element 20 and the coupling head portion 21 of the coupling counterpart, as schematically shown in Fig. 5 .
  • the sewing processing can be performed by inserting a sewing needle through the gap 31. Therefore, the sewing processing can be smoothly and stably performed so that vertical move of the sewing needle is not interrupted by the fastener element 20 of the coupling counterpart.
  • the second width dimension W2 which is a dimension in the width direction from the boundary portion 29 provided on the lower surface of the upper leg portion 23 to the element end edge on the tape inner side of the fastener element 20 is 50% or larger and 70% or smaller of the width dimension We of the entire fastener element 20. Since the second width dimension W2 is 50% or larger of the width dimension We of the entire fastener element 20, the above-mentioned element contacting portion 23a can be arranged at an appropriate position in the tape width direction, and thus when the right and left fastener elements 20 are coupled, the above-mentioned gap 31 can be stably provided.
  • the second width dimension W2 is 70% or smaller of the width dimension We of the entire fastener element 20, a size of the second space portion 25b can be appropriately secured. Therefore, when the slider 40 is slid in the closing direction of the slide fastener 1 to couple the right and left element rows 12, a part of the coupling head portion 21 of the coupling counterpart can be smoothly inserted into the second space portion 25b of each fastener element 20, and the right and left fastener elements 20 can be stably coupled, which enables good slidability of the slider 40.
  • the above-mentioned clearance 30 is provided between the third upper surface (top end surface) 27c and the bent portion 28, and a difference between the height position of the first upper surface 27a and the third upper surface 27c of the upper leg portion 23 is secured to a large degree. Further, the sewing thread 14 is contacted with the first upper surface 27a of the upper leg portion 23, and fixes the upper leg portion 23 to the fastener tape 13 firmly.
  • the slide fastener 1 of Embodiment has a structure that the fastener element 20 is less likely to be removed from the sewn portion 15 despite it has no core string, thereby it has a stable quality to be able to endure long-time use.
  • the fastener element 20 is fixed to the fastener tape 13 with the sewn portion 15 which includes two needle threads 14a and one looper thread 14b and is formed by multi-thread chain stitching.
  • the form of the sewn portion for fixing the fastener element is not particularly limited as long as a part of the sewing thread in the sewn portion is contacted with the first upper surface of the fastener element.
  • the fastener element 20 is fixed to the fastener tape 13 with a sewn portion 17 which uses a sewing thread 16 including one needle thread 16a and one looper thread 16b and is formed by multi-thread chain stitching.
  • the fastener element 20 can be stably fixed to the fastener tape 13 also by employing such a sewn portion 17 according to the modified example.
  • the sewn portion 17 of the modified example is formed to have the fewer number of the needle threads 16a compared with the case of the sewn portion 15 of Embodiment as mentioned above. Therefore, further cost reduction can be realized.

Landscapes

  • Slide Fasteners (AREA)

Claims (6)

  1. Une chaîne de fermeture comprenant une paire de demi-chaînes de fermeture (11) dans lesquels une pluralité d'éléments de fixation (20) se continuant selon une forme de bobine sont cousus à des bandes de fixation droite et gauche (13) avec un fil à coudre (14, 16) ; l'élément de fixation (20) comprenant une portion (21) formant tête de liaison, une portion (22) formant jambe inférieure s'étendant à partir d'une partie d'extrémité de la portion (21) formant tête de liaison dans le sens de la largeur de bande et étant en contact avec la bande de fixation (13), une portion (23) formant jambe supérieure s'étendant dans la direction de la largeur de bande à partir de l'autre partie d'extrémité de la portion (21) formant tête de liaison de façon à être séparée de la portion (22) formant jambe inférieure, et une portion de liaison (24) reliant la portion (23) formant jambe supérieure et la portion (22) formant jambe inférieure d'un autre élément de fixation (20) adjacent dans le sens de la longueur,
    l'élément de fixation (20) est cousu à la bande de fixation (13) de telle sorte que la portion (23) formant jambe supérieure et la portion (22) formant jambe inférieure se font face via une portion (25) formant espace,
    le fil à coudre (14, 16) perce la bande de fixation (13),
    caractérisée en ce que :
    la portion (23) formant jambe supérieure comprend une première surface supérieure (27a) se prolongeant à partir de la portion de liaison (24), et une deuxième surface supérieure (27b) s'étendant et étant inclinée vers le haut depuis la première surface supérieure (27a) via une partie courbée (28) vers la portion (21) formant tête de liaison,
    le fil à coudre (14, 16) est disposé de façon à être en contact avec la première surface supérieure (27a) de la portion (23) formant jambe supérieure,
    une dimension de hauteur (H1) entre une position d'une surface d'extrémité supérieure (27c) de la portion (23) formant jambe supérieure disposée d'une façon la plus éloignée de la bande de fixation (13) et une position de la partie courbée (28) est égale ou supérieure à 20 % d'une dimension de hauteur (He) de l'ensemble de l'élément de fixation (20),
    la portion (23) formant jambe supérieure comprend une première surface inférieure (26a) qui est inclinée de façon à s'écarter de la bande de fixation (13) vers la portion (21) formant tête de liaison, et une deuxième surface inférieure (26b) qui est inclinée de façon à s'approcher de la bande de fixation (13) vers la portion (21) formant tête de liaison ou parallèlement à la bande de fixation (13), et
    la portion (23) formant jambe supérieure comprend une portion (23a) de contact d'élément avec laquelle l'élément de fixation (20) de la contrepartie de liaison est en contact.
  2. La chaîne de fermeture selon la revendication 1, caractérisée en ce que la portion (25) formant espace comprend une première portion (25a) formant espace disposée du côté de la portion de liaison (24) de la partie courbée (28), et une deuxième portion (25b) formant espace disposée du côté de la portion (21) formant tête de liaison de la partie courbée (28) et a une dimension en hauteur plus grande que la première portion (25a) formant espace,
    la portion (23a) de contact d'élément est disposée pour former un renflement selon une forme de surface convexe vers la deuxième portion (25b) formant espace dans une vue en plan de l'élément de fixation (20).
  3. La chaîne de fermeture selon la revendication 1 ou la revendication 2, caractérisée en ce qu'une dimension de hauteur (H1) entre une position de la surface d'extrémité supérieure (27c) et une position de la partie courbée (28) dans la portion (23) formant jambe supérieure est 25 % ou moins de la dimension de hauteur (He) de l'ensemble de l'élément de fixation (20).
  4. La chaîne de fermeture selon l'une quelconque des revendications 1 à 3 caractérisée en ce qu'un monofilament formant une pluralité d'éléments de fixation (20) a une forme en section transversale au niveau de la portion (23) formant jambe supérieure et de la portion (22) formant jambe inférieure présentant une forme aplatie et sensiblement ovale selon laquelle une dimension en largeur du monofilament est plus grande qu'une dimension en hauteur du monofilament.
  5. La chaîne de fermeture selon l'une quelconque des revendications 1 à 4 caractérisée en ce que la valeur maximale de la dimension en hauteur de la deuxième portion (25b) formant espace est de 50 % ou plus et de 100 % ou moins de la dimension en hauteur de la portion (22) formant jambe inférieure.
  6. Une fermeture à glissière caractérisée en ce que la fermeture à glissière est formée en fixant un curseur (40) aux rangées d'éléments droite et gauche (12) de la chaîne de fermeture (10) selon l'une quelconque des revendications 1 à 5.
EP19927829.2A 2019-05-09 2019-05-09 Chaîne de fermeture, et fermeture à glissière Active EP3967176B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2019/018602 WO2020225915A1 (fr) 2019-05-09 2019-05-09 Chaîne de fermeture, et fermeture à glissière

Publications (3)

Publication Number Publication Date
EP3967176A1 EP3967176A1 (fr) 2022-03-16
EP3967176A4 EP3967176A4 (fr) 2022-05-04
EP3967176B1 true EP3967176B1 (fr) 2024-02-14

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ID=73050754

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US (1) US11786016B2 (fr)
EP (1) EP3967176B1 (fr)
CN (1) CN113795172B (fr)
TW (1) TWI834833B (fr)
WO (1) WO2020225915A1 (fr)

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JPS4939136B1 (fr) 1968-11-20 1974-10-23
DK127910B (da) 1968-12-27 1974-02-04 Opti Holding Ag Lynlås med skruelinieformede låseledrækker af et formstof.
US3789465A (en) * 1969-07-17 1974-02-05 Textron Inc Slide fastener device
JPS5245363Y2 (fr) * 1971-07-31 1977-10-15
JPH0410711U (fr) * 1990-05-18 1992-01-29
JPH0763408B2 (ja) * 1990-07-03 1995-07-12 ワイケイケイ株式会社 スライドファスナー用連続ファスナーエレメント
JP3628215B2 (ja) 1999-07-30 2005-03-09 Ｙｋｋ株式会社 コイル状スライドファスナー
JP2001178508A (ja) 1999-12-27 2001-07-03 Ykk Corp スライドファスナー用ファスナーエレメント
CN2631270Y (zh) 2003-08-08 2004-08-11 张志忠 尼龙拉链的链齿
JP4447492B2 (ja) * 2005-03-14 2010-04-07 Ｙｋｋ株式会社 線条スライドファスナー
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WO2013042228A1 (fr) * 2011-09-21 2013-03-28 Ykk株式会社 Fermeture à glissière et procédé de fabrication d'une fermeture à glissière
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TW201815310A (zh) * 2016-10-24 2018-05-01 周朝木 具連續式扣合元件之拉鏈

Also Published As

Publication number Publication date
US11786016B2 (en) 2023-10-17
CN113795172A (zh) 2021-12-14
US20220192325A1 (en) 2022-06-23
EP3967176A1 (fr) 2022-03-16
CN113795172B (zh) 2023-02-21
WO2020225915A1 (fr) 2020-11-12
EP3967176A4 (fr) 2022-05-04
TW202041167A (zh) 2020-11-16
TWI834833B (zh) 2024-03-11

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